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Related Experiment Videos

Multicenter study of stentless valve replacement in the small aortic root

U Hvass1, G M Palatianos, R Frassani

  • 1Hopital Bichat, Paris, France.

The Journal of Thoracic and Cardiovascular Surgery
|January 27, 1999
PubMed
Summary

Stentless porcine valves effectively treat elderly patients with small aortic roots, showing mild residual obstruction. These valves offer a suitable solution for aortic valve replacement in this challenging patient group.

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Area of Science:

  • Cardiovascular Surgery
  • Biomaterials in Medicine
  • Geriatric Cardiology

Background:

  • Small aortic roots present surgical challenges for aortic valve replacement.
  • Stentless bioprosthetic valves are an alternative to stented valves.

Purpose of the Study:

  • To evaluate the clinical outcomes of stentless porcine valves in patients with small aortic roots (19- and 21-mm aortic annulus).

Main Methods:

  • A multi-institutional clinical study included 171 patients with small aortic roots undergoing valve replacement.
  • Patients received either 19-mm or 21-mm stentless porcine valves.
  • Hemodynamic parameters and complication rates were assessed over a 6-year follow-up period.

Main Results:

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  • Hospital mortality was 3.5%.
  • Mean gradients remained low and stable (e.g., 6-9 mm Hg) post-implantation.
  • Effective orifice area was adequate (1.45-1.72 cm²), with minimal aortic regurgitation.

    • Conclusions:

    • Stentless porcine valves are a suitable option for elderly patients with small aortic roots.
    • These valves provide favorable hemodynamics with mild residual obstruction.
    • The use of stentless valves in this cohort demonstrates good long-term stability.